Boring-machine



(No Model.) 2 Sheets-Sheet 1.

, .B. D. WHITNEY.

BORING MACHINE. N0. 514,579. I Patented Feb. 13, 1894.

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(No Model) B. D. WHITNEY. BORING MACHINE. No. 514,579. Patented Feb. 13

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BAXTER I). YVHITNEY, OF VINOHENDON, MASSACHUSETTS.

BORING-MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 514,579, datedFebruary 13, 1894.

Application filed May 6. 1892. Serial No.432,048- (No model.)

To all whom zltmaty concern.-

' Be it known that I, BAXTER D. WVHITNEY, a citizenof the United States,residing atVVinchendon,in the countyof Worcester and State ofMassachusetts, have invented certain newand useful Improvements inBoring-Machines; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to machines for borin g holes in wood or othermaterial by means of verticallynnoving bits, or boring implements, andit consists of improved means for applying both power to force the bitto the work and a spring for withdrawing or lifting the bit, andofde'vices for regulating the tension of the spring, and for theguidance and adjustment of the bit spindle, boring table and guidingbelt, the, as will be more fully shown in the following description audt-he aocompanying drawings of which- Figure l a front elevation of themachine. Fig. 2 is partial rear view to showapplication of guide pulleysfor belt. Fig. 3 is a view from side of machine partly sectional to showapplication of lifting spring and its attach ments, also the mechanismof the table.- Fig. at is a vertical section on line a a of Fig. 3,which, looking from the rear of the machine, shows parts for guiding thespindle.

Similar letters of reference designate corresponding parts in thedifferent figures.

A designates a post, column or pillar, constituting the frame-work towhich the several parts of the machine are attached. This, asrepresented in the drawings is conveniently made of cast metal with abroad pedestal or base, to afiord suitable support upon its foundation.At its front are two boxes, or hangings for a vertically moving tubularshaft, or bar B, which carries two arms 0 C, with journal boxes G 0 fora vertical spindle D by which the bit or boring implement E, is held andreceives requisite rotary motion through a belt F from a driving shaft Glocated at the base and rear of the column A. To guide this belt in itssomewhat indirect course, two pulleys H H are hung upon properly positinned studs or axles, as shown in Fig. 2, attached to a movable hangerI, which depends from an arm projecting rearwardly from the frame A andhorizontally adjustable thereon, so that the tension of the belt may becon veniently regulated thereby, thus enabling the use of whole orendless belting and avoiding the necessity of relacing in tighteningsame.

J is a table for supporting material or articles to be bored, inposition for action of the bit. It rests upon a verticallyadj ustablebracket J, whichis connected to the column A by suitable ways J 2 J andis movable thereon to afford proper space for diiferent kinds of work,by means of a screw J operated by a hand wheel, or crank J and bevelgears as shown.

The top-plate of the table is adjustable to different inclinations ofits plane, for augular work, by means of curved bearings J J under thesame, which are made concentric, or nearly so, to the lines ofintersection of the axis of the bit-spindle and the plane of the surfaceof the table, and it may be secured in any position within its range bymeans of binding screws J .1 which pass through appropriate slots in onepart of the curved bearings to provide for such adjustment of the table,thereby making a very convenient and practical adaptation for many uses.

K is a fender, or shield, connected to the pillar A incasing the belt F,also forming a lateral support and guide for the journal box 0 of thebit spindle; adjustable pieces K K being attached thereto to engage withbox 0 for that purpose.

For drawing the bit downward to its work a treadle or foot lever L ispivotally attached by a fulcrum pin L at the base of the column A, andconnected to the tubular bar B by a rod M, which has acylindrical nut,or threaded collar M fitted to the screw thread at the upper end of therod and made to engage with an internal ring, or bushing B attached tothe lower end of the bar B, so that by action of the nut M the distancebetween the bar and the treadle may be lengthened or shortened to giverequisite movement of the foot for the work in process.

To withdraw the bit from the work a spiral spring N is incased withinthe tubular bar B and at its upper end engages with another ring 13against which it acts to lift the state what I claim as my invention anddesire bar and its attachments. At its lower end the spring rests upon aflange, or collar, connected to a rod 0, which rod extends upwardlysomewhat above the tubular bar, and is held up by a nut resting on theplate, or collar 0', which receives support from the upper end of thebox for the tubular bar. The tension of the spring to balance the weightand friction of its load is adjusted by the thread and nut on the rod 0.This application of the spring and treadle connections, in a direct lineof draft, gives an easy and natural action to the operating parts; andavoids to a great extent the lateral pressure, or cramping and frictionwhich there would be were not the power from the treadle applied indirect line of the action of the spring, or lifting power. It likewisemakes a very neat and compact arrangement, and adds much to theappearance as well as the utility of the machine.

As the action of the machine is readilyper ceptible from the descriptiongiven, I will to secure by Letters Patent, as follows:

1. The combination of the column A,avertically movable shaft B supportedin bearings on said column and having arms 0 O,carrybeds and securedthereto at desired positions by means of binding screws J J which passthrough slots in said curved bearers, substantially as shown anddescribed.

3. A spring incascd in a tubular bar supporting the bit-spindle of theboring machine, substantially as described.

4. The combination of the column A, a vertically movable shaft Bsupported in bearings on said column, and having armsG O, carrying boxes(3 G a vertical spindle D in said boxes, a boring implement E carried bysaid spindle, a belt F for driving said spindle, a pulley G and the twopulleys H H hung upon differently placed studs as shown, upon the hangerI, thus enabling the use of an endless belt, substantially as and forthe purpose specified.

5. The combination of the column A, a vertically movable shaft B,supported in bearin gs on said column, and having arms 0 O, carryingboxes 0 G a vertical spindle D in said boxes, carrying a boringimplement E, a belt F for drivingsaid spindle, a fender or shield K,secured to pillar A and inclosin g belt and also forming a lateralsupport and guide for boxes, carrying boring implement E, a belt F fordriving spindle D, the table J, vertically ad justable'bracket Jtherefor, connected to column A by ways J J the operating screw J 3 forsaid bracket, all arranged sub stantially as and for the purposedescribed.

7. The combination of column A, a Vertically movable shaft B, supportedin bearings on said column and having arms 0 O,carrying boxes 0 0 avertical spindle D in said boxes, carrying boring implement E, a belt Ffor driving the spindle D, the table J, vertically adjustable bracket Jtherefor, connected to column A by ways J J the operating screw J forsaid bracket, the curved bearings J J for the table J, which are madeconcentric with the line of intersection of the axis of the bit spindleand the plane of the surface of the table, together with the bindingscrews J 6 J all arranged substantially as and for the purposedescribed.

8. The combination of the column A, a vertically movable tubular shaftB, the boring spindle carried thereby, a foot lever L connected to thetubular shaft B by rod M, hav- 95 ing a cylindrical nut M, fitted to ascrew thread at the upper end of the rod and made to engage with aninternal ring, attached to the lower end of shaft B, substantially asdescribed.

9. The combination of the column A, tubular bar B, carried thereby, aboring device carried by said shaft, a spiral spring N within bar B, aring B" within the upper end of bar B which is engaged by the spring,the lower :05 end of said spring resting on a flange on arod 0,extending up through the upper end of bar B and held by nut O,substantially as described.

10. The combination ofthe pillar A, the ver- 1 r0 tically adjustabletubular bar B, carried in bearings on said pillar, a boring devicecarried by said bar, a spiral springNwithin the barB and a flanged rod 0engaging the spring and extending up through the upper end of :15 thebar B where it is held by a nut, and a 'treadle mechanism connected toand operat- BAXTER D. WHITNEY.

Witnesses:

GEO. M. WHITNEY, ELLERY L. HODGKINS.

